How do you analyze a political cartoon?

I used this website to show me how to analyze political cartoons. The steps were:
1. Recognize exaggeration
2. Understand symbolism
3. Understand labeling
4. Understand analogy
5. Recognize irony
I already knew that political cartoons exaggerate a lot to get their point across, and they use symbolism and irony together to get their point across even better. I already knew these steps, but it is still hard to do these things sometimes.
Going forward, I think the guide above is the best way to analyze political cartoons because it is simple, but gets the all the points across very well.
  This shows how America went in the Filipinos' land and basically just took over their land and country and made them our work-horses.

This shows the Filipino boy being portrayed as a savage and Uncle Sam not being very happy about the $20,000,000 check that he wrote to acquire the Filipinos' land.

This cartoon shows Uncle Sam riding on two globes, this shows how during this time, the US was going around the world, trying to claim as much land as they could, thinking the world was theirs.